3935354 ÷ 391 
Our goal is to divide 3935354 by 391.

Step 1:
When dividing 3 by 391, we get 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 391

On to step 2:
39 divided by 391 is 0 with a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 39, we get 39.
Include the next digit (3) from the dividend after 39, then repeat: 393 / 391

On to step 3:
391 goes into 393 1 times with a remainder of 2.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 391 from 393, we get 2.
Append the next digit (5) from the dividend to 2 and continue with: 25 / 391

Moving on to step 4:
The number 391 fits into 25 0 times, leaving a remainder of 25.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we take 0 away from 25, we end up with 25.
Include the next digit (3) from the dividend after 25, then repeat: 253 / 391

On to step 5:
253 divided by 391 is 0 with a remainder of 253.
The next digit of our result is 0. 
Result so far: 100.0
The remainder is 253 after subtracting 0 from 253.
Append the next digit (5) from the dividend to 253 and continue with: 2535 / 391

Step 6:
The number 391 fits into 2535 6 times, leaving a remainder of 189.
Put 6 as the next digit of the answer. 
Result so far: 1006.0
The remainder is 189 after subtracting 2346 from 2535.
Grab the next digit (4) from the dividend, add it to 189, then carry on: 1894 / 391

Moving on to step 7:
When dividing 1894 by 391, we get 4 with a remainder of 330.
The number 4 becomes the next digit in our result. 
Result so far: 10064.0
If we subtract 1564 from 1894, we get 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Advancing to step 8:
391 goes into 3300 8 times with a remainder of 172.
Record the quotient 8 as the next digit in the result. 
Result so far: 10064.8
The remainder is 172 after subtracting 3128 from 3300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

Going ahead to step 9:
391 goes into 1720 4 times with a remainder of 156.
Put 4 as the next digit of the answer. 
Result so far: 10064.84
Deduct 1564 from 1720 and we're left with 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Moving on to step 10:
If we divide 1560 by 391, we get 3 and a remainder of 387.
Record the quotient 3 as the next digit in the result. 
Result so far: 10064.843
If we take 1173 away from 1560, we end up with 387.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3870, and continue the process.

Step 11:
If we divide 3870 by 391, we get 9 and a remainder of 351.
Record the quotient 9 as the next digit in the result. 
Result so far: 10064.8439
Subtracting 3519 from 3870 leaves us with 351.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3510, and continue the process.

Advancing to step 12:
When dividing 3510 by 391, we get 8 with a remainder of 382.
The next digit of our result is 8. 
Result so far: 10064.84398
If we take 3128 away from 3510, we end up with 382.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3820, and continue the process.

Going ahead to step 13:
3820 divided by 391 is 9 with a remainder of 301.
Put 9 as the next digit of the answer. 
Result so far: 10064.843989
If we subtract 3519 from 3820, we get 301.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3010, and continue the process.

On to step 14:
391 can be fit into 3010 7 times, resulting in a remainder of 273.
Record the quotient 7 as the next digit in the result. 
Result so far: 10064.8439897
If we take 2737 away from 3010, we end up with 273.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2730, and continue the process.

Step 15:
The number 391 fits into 2730 6 times, leaving a remainder of 384.
Write down 6 as next digit of the result. 
Result so far: 10064.84398976
If we take 2346 away from 2730, we end up with 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

In conclusion, the division gives 10064.84398976 with a balance of 3.84e-07.